fix: Update backend base image

[gonzalezzfelipe]

Summary by CodeRabbit

• Chores
  • Updated backend container runtime to Rust 1.93 for improved performance and security enhancements.

[coderabbitai]

Caution

Review failed

The pull request is closed.

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro

Run ID: d2c61f0b-9113-45c5-b6d5-954114f72b4d

📥 Commits

Reviewing files that changed from the base of the PR and between b468155 and ed7a640.

📒 Files selected for processing (1)

• docker/Dockerfile.backend

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📝 Walkthrough

Walkthrough

Updated Rust base image versions from 1.88 to 1.93 in the backend Dockerfile across both build and runtime stages. Applied whitespace normalization to apt commands for consistency.

Changes

Cohort / File(s)	Summary
Docker Build Configuration docker/Dockerfile.backend	Updated Rust base image from 1.88 to 1.93 in both the build stage (rust:1.93 AS build) and runtime stage (rust:1.93-slim). Normalized whitespace in apt commands for consistency.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~5 minutes

Poem

🐰 From eighty-eight to ninety-three we leap,
New Rust flows through our Docker keep,
Trailing spaces trimmed so neat,
Version bumps, our update's sweet! 🦀✨

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Post copyable unit tests in a comment
• Commit unit tests in branch fix/asteria-backend-base-image

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